Fox Jupiter Folders

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The Jupiter folding knife represents the pinnacle of evolution in locking mechanisms, building on the renowned Radius and Saturn models. It introduces a new safety lock that secures the blade in both the open and closed positions, making it even more capable for heavy-duty tasks. The design retains the signature features of its predecessors while seamlessly integrating the circular element housing the advanced mechanics.
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Fox FX-555 TIBL Denis Simonutti Jupiter Radius Button Lock Folding Knife 3.07" M390 Satin Modif…Retail price: $890.99, our price: $712.79
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Fox FX-555 TIBR Denis Simonutti Jupiter Radius Button Lock Folding Knife 3.07" M390 Black Stone…Retail price: $769.99, our price: $615.99
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Fox FX-555 TICF Denis Simonutti Jupiter Radius Button Lock Folding Knife 3.07" M390 Stonewashed…Retail price: $827.99, our price: $662.39
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About the Fox Knives Jupiter

Designed by Denis Simonutti, the Fox Jupiter series pairs the innovative Radius button lock with premium M390 steel and precision titanium construction. An integrated secondary safety and ergonomic handle geometry ensure this high-end design performs reliably during heavy utility tasks.

How does the locking mechanism on the Fox Jupiter work?
The Fox Jupiter uses a Radius button lock where you press the button down and rotate it along an arc around the pivot to deploy or close the blade. It also includes a secondary sliding safety that locks the mechanism in both the open and closed positions, preventing accidental opening in a pocket and eliminating the chance of disengaging the lock during hard use.
What blade steel does the Fox Jupiter use?
The Fox Jupiter is built with premium M390 stainless steel on a blade measuring slightly over three inches long. M390 offers high wear resistance and excellent corrosion resistance, holding a sharp edge through extended cutting sessions.
What handle materials and finishes are available on the Fox Jupiter?
The Fox Jupiter series features titanium handles offered in several configurations. Depending on the variant, options include bead-blasted titanium with Jungle Wear FatCarbon inlays, blue titanium accents, or full topographic milled patterns with dark PVD coatings.
What cutting tasks is the Fox Jupiter best suited for?
The Fox Jupiter is engineered for heavy utility work and detailed everyday cutting. The angled handle profile creates generous knuckle clearance when making flat push cuts or dragging the tip, allowing you to apply firm downward pressure close to the cutting surface without rapping your knuckles.